Question $2$: The Zero Lower Bound

$1)$Plot since $2000$the nominal interest rate on the Japanese long$-$term $(10-$year$)$government bond $($FRED code: IRLTLT$01$JPM$156$N$),$the inflation rate based on the percentage change from a year ago of the Japan's consumer price index $($FRED code: JPNCIALLMINMEI, and then plot the estimated value of the real interest rate based on the difference between these two abovementioned indicators.

$2)$Comment on the lengthy period of the positive real rates since $2000$and the role of deflation in determining the real rate. Discuss the risks that the deflation poses in an economy with the nominal interest rate at the zero lower bound.

Could you help me answer question $2)$based on the graph? Nominal Interest Rates, Inflation, and Real Interest Rates in Japan $(2000-2021)$

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Interest Rates: Long$-$Term Government Bond Yields: $10-$Year: Main $($Including Benchmark$)$ for Japan

Consumer Price Indices $($CPIs$,$ HICPs$),$ COICOP $1999$: Consumer Price Index: Total for Japan